> But the biggest is that the people are truly interested in intellectual matters in a way that was not extant in the other places I've lived.
That seems like it used to be true more than it is now. I live in Austin, and you can't go to a downtown coffee shop without hearing a spirited discussion about programming languages, frameworks or even conversion rates (I heard that last one standing in line at a taco place the other day.)
It's partially, I think, because programming and computers are more ingrained in the culture at large, and mostly because SF got too expensive and so places like Austin, Seattle, and Portland have a significant number of tech startups now.